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345 lines
14 KiB
345 lines
14 KiB
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/movies/movies.doc:4 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Movies or the Story of the Animated GIF file</title>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Movies or the Story of the Animated GIF file</h1>
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<p>
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The Movies example displays MNG and animated GIF files using the <a href="tqmovie.html">TQMovie</a> and
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<a href="tqlabel.html">TQLabel</a> classes.
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<p> The movies will only read an animated GIF if GIF reading was enabled when TQt was built.
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<p> <hr>
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<p> Main:
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<p> <pre>/****************************************************************************
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** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include <<a href="qapplication-h.html">ntqapplication.h</a>>
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#include <<a href="tqfiledialog-h.html">tqfiledialog.h</a>>
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#include <<a href="tqpushbutton-h.html">tqpushbutton.h</a>>
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#include <<a href="tqlabel-h.html">tqlabel.h</a>>
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#include <<a href="tqpainter-h.html">tqpainter.h</a>>
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#include <<a href="tqmessagebox-h.html">tqmessagebox.h</a>>
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#include <<a href="tqmovie-h.html">tqmovie.h</a>>
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#include <<a href="tqvbox-h.html">tqvbox.h</a>>
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class MovieScreen : public <a href="tqframe.html">TQFrame</a> {
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<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
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<a href="tqmovie.html">TQMovie</a> movie;
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<a href="tqstring.html">TQString</a> filename;
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<a href="tqsize.html">TQSize</a> sh;
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public:
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MovieScreen(const char* fname, TQMovie m, TQWidget* p=0, const char* name=0, WFlags f=0) :
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<a href="tqframe.html">TQFrame</a>(p, name, f),
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sh(100,100)
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{
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setCaption(fname);
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filename = fname;
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movie = m;
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// Set a frame around the movie.
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setFrameStyle(TQFrame::WinPanel|TQFrame::Sunken);
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// No background needed, since we draw on the whole widget.
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<a name="x523"></a> movie.<a href="tqwidget.html#setBackgroundColor">setBackgroundColor</a>(backgroundColor());
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setBackgroundMode(NoBackground);
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// Get the movie to tell use when interesting things happen.
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<a name="x500"></a> movie.<a href="tqmovie.html#connectUpdate">connectUpdate</a>(this, TQ_SLOT(movieUpdated(const <a href="tqrect.html">TQRect</a>&)));
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<a name="x498"></a> movie.<a href="tqmovie.html#connectResize">connectResize</a>(this, TQ_SLOT(movieResized(const <a href="tqsize.html">TQSize</a>&)));
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<a name="x499"></a> movie.<a href="tqmovie.html#connectStatus">connectStatus</a>(this, TQ_SLOT(movieStatus(int)));
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setSizePolicy(TQSizePolicy(TQSizePolicy::Expanding,TQSizePolicy::Expanding));
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}
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<a href="tqsize.html">TQSize</a> sizeHint() const
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{
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return sh;
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}
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protected:
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// Draw the contents of the TQFrame - the movie and on-screen-display
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void drawContents(TQPainter* p)
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{
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// Get the current movie frame.
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<a name="x502"></a> <a href="tqpixmap.html">TQPixmap</a> pm = movie.<a href="tqmovie.html#framePixmap">framePixmap</a>();
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// Get the area we have to draw in.
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<a href="tqrect.html">TQRect</a> r = contentsRect();
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<a name="x511"></a> if ( !pm.<a href="tqpixmap.html#isNull">isNull</a>() ) {
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// Only rescale is we need to - it can take CPU!
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<a name="x516"></a><a name="x512"></a> if ( r.<a href="tqrect.html#size">size</a>() != pm.<a href="tqpixmap.html#size">size</a>() ) {
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<a href="tqwmatrix.html">TQWMatrix</a> m;
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<a name="x524"></a><a name="x517"></a><a name="x513"></a> m.<a href="tqwmatrix.html#scale">scale</a>((double)r.<a href="tqrect.html#width">width</a>()/pm.<a href="tqpixmap.html#width">width</a>(),
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<a name="x515"></a><a name="x510"></a> (double)r.<a href="tqrect.html#height">height</a>()/pm.<a href="tqpixmap.html#height">height</a>());
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<a name="x514"></a> pm = pm.<a href="tqpixmap.html#xForm">xForm</a>(m);
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}
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// Draw the [possibly scaled] frame. movieUpdated() below calls
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// repaint with only the changed area, so clipping will ensure we
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// only do the minimum amount of rendering.
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//
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<a name="x519"></a><a name="x518"></a> p->drawPixmap(r.<a href="tqrect.html#x">x</a>(), r.<a href="tqrect.html#y">y</a>(), pm);
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}
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// The on-screen display
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const char* message = 0;
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<a name="x504"></a> if (movie.<a href="tqmovie.html#paused">paused</a>()) {
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message = "PAUSED";
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<a name="x501"></a> } else if (movie.<a href="tqmovie.html#finished">finished</a>()) {
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message = "THE END";
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<a name="x507"></a> } else if (movie.<a href="tqmovie.html#steps">steps</a>() > 0) {
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message = "FF >>";
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}
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if (message) {
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// Find a good font size...
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p->setFont(TQFont("Helvetica", 24));
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<a href="tqfontmetrics.html">TQFontMetrics</a> fm = p->fontMetrics();
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<a name="x496"></a> if ( fm.<a href="tqfontmetrics.html#width">width</a>(message) > r.<a href="tqrect.html#width">width</a>()-10 )
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p->setFont(TQFont("Helvetica", 18));
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fm = p->fontMetrics();
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if ( fm.<a href="tqfontmetrics.html#width">width</a>(message) > r.<a href="tqrect.html#width">width</a>()-10 )
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p->setFont(TQFont("Helvetica", 14));
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fm = p->fontMetrics();
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if ( fm.<a href="tqfontmetrics.html#width">width</a>(message) > r.<a href="tqrect.html#width">width</a>()-10 )
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p->setFont(TQFont("Helvetica", 12));
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fm = p->fontMetrics();
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if ( fm.<a href="tqfontmetrics.html#width">width</a>(message) > r.<a href="tqrect.html#width">width</a>()-10 )
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p->setFont(TQFont("Helvetica", 10));
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// "Shadow" effect.
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p->setPen(black);
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p->drawText(1, 1, width()-1, height()-1, AlignCenter, message);
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p->setPen(white);
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p->drawText(0, 0, width()-1, height()-1, AlignCenter, message);
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}
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}
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public slots:
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void restart()
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{
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<a name="x505"></a> movie.<a href="tqmovie.html#restart">restart</a>();
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repaint();
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}
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void togglePause()
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{
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if ( movie.<a href="tqmovie.html#paused">paused</a>() )
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<a name="x508"></a> movie.<a href="tqmovie.html#unpause">unpause</a>();
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else
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<a name="x503"></a> movie.<a href="tqmovie.html#pause">pause</a>();
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repaint();
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}
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void step()
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{
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<a name="x506"></a> movie.<a href="tqmovie.html#step">step</a>();
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repaint();
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}
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void step10()
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{
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movie.<a href="tqmovie.html#step">step</a>(10);
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repaint();
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}
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private slots:
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void movieUpdated(const <a href="tqrect.html">TQRect</a>& area)
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{
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if (!isVisible())
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show();
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// The given area of the movie has changed.
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<a href="tqrect.html">TQRect</a> r = contentsRect();
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if ( r.<a href="tqrect.html#size">size</a>() != movie.<a href="tqmovie.html#framePixmap">framePixmap</a>().size() ) {
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// Need to scale - redraw whole frame.
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repaint( r );
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} else {
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// Only redraw the changed area of the frame
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repaint( area.<a href="tqrect.html#x">x</a>()+r.<a href="tqrect.html#x">x</a>(), area.<a href="tqrect.html#y">y</a>()+r.<a href="tqrect.html#x">x</a>(),
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area.<a href="tqrect.html#width">width</a>(), area.<a href="tqrect.html#height">height</a>() );
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}
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}
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void movieResized(const <a href="tqsize.html">TQSize</a>& size)
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{
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// The movie changed size, probably from its initial zero size.
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int fw = frameWidth();
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<a name="x521"></a><a name="x520"></a> sh = TQSize( size.<a href="tqsize.html#width">width</a>() + fw*2, size.<a href="tqsize.html#height">height</a>() + fw*2 );
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<a href="tqwidget.html#updateGeometry">updateGeometry</a>();
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if ( <a href="tqwidget.html#parentWidget">parentWidget</a>() && parentWidget()->isHidden() )
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<a href="tqwidget.html#parentWidget">parentWidget</a>()->show();
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}
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void movieStatus(int status)
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{
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// The movie has sent us a status message.
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if (status < 0) {
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<a href="tqstring.html">TQString</a> msg;
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msg.<a href="tqstring.html#sprintf">sprintf</a>("Could not play movie \"%s\"", (const char*)filename);
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TQMessageBox::<a href="tqmessagebox.html#warning">warning</a>(this, "movies", msg);
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<a href="tqwidget.html#parentWidget">parentWidget</a>()->close();
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} else if (status == TQMovie::Paused || status == TQMovie::EndOfMovie) {
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<a href="tqwidget.html#repaint">repaint</a>(); // Ensure status text is displayed
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}
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}
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};
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class MoviePlayer : public <a href="tqvbox.html">TQVBox</a> {
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MovieScreen* movie;
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public:
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MoviePlayer(const char* fname, TQMovie m, TQWidget* p=0, const char* name=0, WFlags f=0) :
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<a href="tqvbox.html">TQVBox</a>(p,name,f)
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{
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movie = new MovieScreen(fname, m, this);
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<a href="tqhbox.html">TQHBox</a>* hb = new <a href="tqhbox.html">TQHBox</a>(this);
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<a href="tqpushbutton.html">TQPushButton</a>* btn;
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btn = new <a href="tqpushbutton.html">TQPushButton</a>("<<", hb);
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<a href="tqobject.html#connect">connect</a>(btn, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), movie, TQ_SLOT(<a href="tqmovie.html#restart">restart</a>()));
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btn = new <a href="tqpushbutton.html">TQPushButton</a>("||", hb);
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<a href="tqobject.html#connect">connect</a>(btn, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), movie, TQ_SLOT(togglePause()));
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btn = new <a href="tqpushbutton.html">TQPushButton</a>(">|", hb);
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<a href="tqobject.html#connect">connect</a>(btn, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), movie, TQ_SLOT(<a href="tqmovie.html#step">step</a>()));
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btn = new <a href="tqpushbutton.html">TQPushButton</a>(">>|", hb);
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<a href="tqobject.html#connect">connect</a>(btn, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), movie, TQ_SLOT(step10()));
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}
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};
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// A TQFileDialog that chooses movies.
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//
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class MovieStarter: public <a href="tqfiledialog.html">TQFileDialog</a> {
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TQ_OBJECT
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public:
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MovieStarter(const char *dir);
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public slots:
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void startMovie(const <a href="tqstring.html">TQString</a>& filename);
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// TQDialog's method - normally closes the file dialog.
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// We want it left open, and we want Cancel to quit everything.
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void done( int r );
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};
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<a name="f258"></a>MovieStarter::MovieStarter(const char *dir)
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: <a href="tqfiledialog.html">TQFileDialog</a>(dir, "*.gif *.mng")
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{
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//behave as in getOpenFilename
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<a href="tqfiledialog.html#setMode">setMode</a>( ExistingFile );
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// When a file is selected, show it as a movie.
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<a href="tqobject.html#connect">connect</a>(this, TQ_SIGNAL(<a href="tqfiledialog.html#fileSelected">fileSelected</a>(const <a href="tqstring.html">TQString</a>&)),
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this, TQ_SLOT(startMovie(const <a href="tqstring.html">TQString</a>&)));
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}
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void <a name="f259"></a>MovieStarter::startMovie(const <a href="tqstring.html">TQString</a>& filename)
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{
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if ( filename ) // Start a new movie - have it delete when closed.
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(new MoviePlayer( filename, TQMovie(filename), 0, 0,
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WDestructiveClose))->show();
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}
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<a name="x495"></a>void MovieStarter::<a href="tqdialog.html#done">done</a>( int r )
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{
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if (r != Accepted)
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tqApp-><a href="ntqapplication.html#quit">quit</a>(); // end on Cancel
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<a href="tqdialog.html#setResult">setResult</a>( r );
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// And don't hide.
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}
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int main(int argc, char **argv)
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{
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<a href="ntqapplication.html">TQApplication</a> a(argc, argv);
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if (argc > 1) {
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// Commandline mode - show movies given on the command line
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//
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bool gui=TRUE;
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for (int arg=1; arg<argc; arg++) {
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if ( TQString(argv[arg]) == "-i" )
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gui = !gui;
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else if ( gui )
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(void)new MoviePlayer(argv[arg], TQMovie(argv[arg]), 0, 0,
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TQt::WDestructiveClose);
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else
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(void)new MovieScreen(argv[arg], TQMovie(argv[arg]), 0, 0,
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TQt::WDestructiveClose);
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}
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TQObject::<a href="tqobject.html#connect">connect</a>(tqApp, TQ_SIGNAL(<a href="ntqapplication.html#lastWindowClosed">lastWindowClosed</a>()), tqApp, TQ_SLOT(<a href="ntqapplication.html#quit">quit</a>()));
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} else {
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// "GUI" mode - open a chooser for movies
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//
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MovieStarter* fd = new MovieStarter(".");
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<a name="x494"></a> fd-><a href="tqdialog.html#show">show</a>();
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}
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// Go!
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return a.<a href="ntqapplication.html#exec">exec</a>();
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}
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#include "main.moc"
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</pre>
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<p>See also <a href="examples.html">Examples</a>.
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<!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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</html>
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